Updating server dependancies (#5249)

vendor/github.com/lib/pq/.travis.yml

@@ -1,10 +1,11 @@
 language: go
 
 go:
-  - 1.5
-  - 1.6
-  - 1.7
-  - tip
+  - 1.5.x
+  - 1.6.x
+  - 1.7.x
+  - 1.8.x
+  - master
 
 sudo: true
 
@@ -15,6 +16,7 @@ env:
     - PQSSLCERTTEST_PATH=$PWD/certs
     - PGHOST=127.0.0.1
   matrix:
+    - PGVERSION=9.6
     - PGVERSION=9.5
     - PGVERSION=9.4
     - PGVERSION=9.3
@@ -39,5 +41,5 @@ script:
   - >
     goimports -d -e $(find -name '*.go') | awk '{ print } END { exit NR == 0 ? 0 : 1 }'
   - go vet ./...
-  - PQTEST_BINARY_PARAMETERS=no  go test -v ./...
-  - PQTEST_BINARY_PARAMETERS=yes go test -v ./...
+  - PQTEST_BINARY_PARAMETERS=no  go test -race -v ./...
+  - PQTEST_BINARY_PARAMETERS=yes go test -race -v ./...

vendor/github.com/lib/pq/array.go

@@ -70,6 +70,9 @@ func (a *BoolArray) Scan(src interface{}) error {
 		return a.scanBytes(src)
 	case string:
 		return a.scanBytes([]byte(src))
+	case nil:
+		*a = nil
+		return nil
 	}
 
 	return fmt.Errorf("pq: cannot convert %T to BoolArray", src)
@@ -80,7 +83,7 @@ func (a *BoolArray) scanBytes(src []byte) error {
 	if err != nil {
 		return err
 	}
-	if len(elems) == 0 {
+	if *a != nil && len(elems) == 0 {
 		*a = (*a)[:0]
 	} else {
 		b := make(BoolArray, len(elems))
@@ -141,6 +144,9 @@ func (a *ByteaArray) Scan(src interface{}) error {
 		return a.scanBytes(src)
 	case string:
 		return a.scanBytes([]byte(src))
+	case nil:
+		*a = nil
+		return nil
 	}
 
 	return fmt.Errorf("pq: cannot convert %T to ByteaArray", src)
@@ -151,7 +157,7 @@ func (a *ByteaArray) scanBytes(src []byte) error {
 	if err != nil {
 		return err
 	}
-	if len(elems) == 0 {
+	if *a != nil && len(elems) == 0 {
 		*a = (*a)[:0]
 	} else {
 		b := make(ByteaArray, len(elems))
@@ -210,6 +216,9 @@ func (a *Float64Array) Scan(src interface{}) error {
 		return a.scanBytes(src)
 	case string:
 		return a.scanBytes([]byte(src))
+	case nil:
+		*a = nil
+		return nil
 	}
 
 	return fmt.Errorf("pq: cannot convert %T to Float64Array", src)
@@ -220,7 +229,7 @@ func (a *Float64Array) scanBytes(src []byte) error {
 	if err != nil {
 		return err
 	}
-	if len(elems) == 0 {
+	if *a != nil && len(elems) == 0 {
 		*a = (*a)[:0]
 	} else {
 		b := make(Float64Array, len(elems))
@@ -320,6 +329,11 @@ func (a GenericArray) Scan(src interface{}) error {
 		return a.scanBytes(src, dv)
 	case string:
 		return a.scanBytes([]byte(src), dv)
+	case nil:
+		if dv.Kind() == reflect.Slice {
+			dv.Set(reflect.Zero(dv.Type()))
+			return nil
+		}
 	}
 
 	return fmt.Errorf("pq: cannot convert %T to %s", src, dv.Type())
@@ -386,7 +400,13 @@ func (a GenericArray) Value() (driver.Value, error) {
 
 	rv := reflect.ValueOf(a.A)
 
-	if k := rv.Kind(); k != reflect.Array && k != reflect.Slice {
+	switch rv.Kind() {
+	case reflect.Slice:
+		if rv.IsNil() {
+			return nil, nil
+		}
+	case reflect.Array:
+	default:
 		return nil, fmt.Errorf("pq: Unable to convert %T to array", a.A)
 	}
 
@@ -412,6 +432,9 @@ func (a *Int64Array) Scan(src interface{}) error {
 		return a.scanBytes(src)
 	case string:
 		return a.scanBytes([]byte(src))
+	case nil:
+		*a = nil
+		return nil
 	}
 
 	return fmt.Errorf("pq: cannot convert %T to Int64Array", src)
@@ -422,7 +445,7 @@ func (a *Int64Array) scanBytes(src []byte) error {
 	if err != nil {
 		return err
 	}
-	if len(elems) == 0 {
+	if *a != nil && len(elems) == 0 {
 		*a = (*a)[:0]
 	} else {
 		b := make(Int64Array, len(elems))
@@ -470,6 +493,9 @@ func (a *StringArray) Scan(src interface{}) error {
 		return a.scanBytes(src)
 	case string:
 		return a.scanBytes([]byte(src))
+	case nil:
+		*a = nil
+		return nil
 	}
 
 	return fmt.Errorf("pq: cannot convert %T to StringArray", src)
@@ -480,7 +506,7 @@ func (a *StringArray) scanBytes(src []byte) error {
 	if err != nil {
 		return err
 	}
-	if len(elems) == 0 {
+	if *a != nil && len(elems) == 0 {
 		*a = (*a)[:0]
 	} else {
 		b := make(StringArray, len(elems))
@@ -639,6 +665,9 @@ Element:
 	for i < len(src) {
 		switch src[i] {
 		case '{':
+			if depth == len(dims) {
+				break Element
+			}
 			depth++
 			dims[depth-1] = 0
 			i++
@@ -680,11 +709,11 @@ Element:
 	}
 
 	for i < len(src) {
-		if bytes.HasPrefix(src[i:], del) {
+		if bytes.HasPrefix(src[i:], del) && depth > 0 {
 			dims[depth-1]++
 			i += len(del)
 			goto Element
-		} else if src[i] == '}' {
+		} else if src[i] == '}' && depth > 0 {
 			dims[depth-1]++
 			depth--
 			i++

vendor/github.com/lib/pq/array_test.go

@@ -70,6 +70,10 @@ func TestParseArrayError(t *testing.T) {
 		{`{,}`, "unexpected ',' at offset 1"},
 		{`{,x}`, "unexpected ',' at offset 1"},
 		{`{x,}`, "unexpected '}' at offset 3"},
+		{`{x,{`, "unexpected '{' at offset 3"},
+		{`{x},`, "unexpected ',' at offset 3"},
+		{`{x}}`, "unexpected '}' at offset 3"},
+		{`{{x}`, "expected '}' at offset 4"},
 		{`{""x}`, "unexpected 'x' at offset 3"},
 		{`{{a},{b,c}}`, "multidimensional arrays must have elements with matching dimensions"},
 	} {
@@ -171,6 +175,30 @@ func TestBoolArrayScanUnsupported(t *testing.T) {
 	}
 }
 
+func TestBoolArrayScanEmpty(t *testing.T) {
+	var arr BoolArray
+	err := arr.Scan(`{}`)
+
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if arr == nil || len(arr) != 0 {
+		t.Errorf("Expected empty, got %#v", arr)
+	}
+}
+
+func TestBoolArrayScanNil(t *testing.T) {
+	arr := BoolArray{true, true, true}
+	err := arr.Scan(nil)
+
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if arr != nil {
+		t.Errorf("Expected nil, got %+v", arr)
+	}
+}
+
 var BoolArrayStringTests = []struct {
 	str string
 	arr BoolArray
@@ -300,6 +328,30 @@ func TestByteaArrayScanUnsupported(t *testing.T) {
 	}
 }
 
+func TestByteaArrayScanEmpty(t *testing.T) {
+	var arr ByteaArray
+	err := arr.Scan(`{}`)
+
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if arr == nil || len(arr) != 0 {
+		t.Errorf("Expected empty, got %#v", arr)
+	}
+}
+
+func TestByteaArrayScanNil(t *testing.T) {
+	arr := ByteaArray{{2}, {6}, {0, 0}}
+	err := arr.Scan(nil)
+
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if arr != nil {
+		t.Errorf("Expected nil, got %+v", arr)
+	}
+}
+
 var ByteaArrayStringTests = []struct {
 	str string
 	arr ByteaArray
@@ -430,6 +482,30 @@ func TestFloat64ArrayScanUnsupported(t *testing.T) {
 	}
 }
 
+func TestFloat64ArrayScanEmpty(t *testing.T) {
+	var arr Float64Array
+	err := arr.Scan(`{}`)
+
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if arr == nil || len(arr) != 0 {
+		t.Errorf("Expected empty, got %#v", arr)
+	}
+}
+
+func TestFloat64ArrayScanNil(t *testing.T) {
+	arr := Float64Array{5, 5, 5}
+	err := arr.Scan(nil)
+
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if arr != nil {
+		t.Errorf("Expected nil, got %+v", arr)
+	}
+}
+
 var Float64ArrayStringTests = []struct {
 	str string
 	arr Float64Array
@@ -560,6 +636,30 @@ func TestInt64ArrayScanUnsupported(t *testing.T) {
 	}
 }
 
+func TestInt64ArrayScanEmpty(t *testing.T) {
+	var arr Int64Array
+	err := arr.Scan(`{}`)
+
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if arr == nil || len(arr) != 0 {
+		t.Errorf("Expected empty, got %#v", arr)
+	}
+}
+
+func TestInt64ArrayScanNil(t *testing.T) {
+	arr := Int64Array{5, 5, 5}
+	err := arr.Scan(nil)
+
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if arr != nil {
+		t.Errorf("Expected nil, got %+v", arr)
+	}
+}
+
 var Int64ArrayStringTests = []struct {
 	str string
 	arr Int64Array
@@ -689,6 +789,30 @@ func TestStringArrayScanUnsupported(t *testing.T) {
 	}
 }
 
+func TestStringArrayScanEmpty(t *testing.T) {
+	var arr StringArray
+	err := arr.Scan(`{}`)
+
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if arr == nil || len(arr) != 0 {
+		t.Errorf("Expected empty, got %#v", arr)
+	}
+}
+
+func TestStringArrayScanNil(t *testing.T) {
+	arr := StringArray{"x", "x", "x"}
+	err := arr.Scan(nil)
+
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if arr != nil {
+		t.Errorf("Expected nil, got %+v", arr)
+	}
+}
+
 var StringArrayStringTests = []struct {
 	str string
 	arr StringArray
@@ -811,6 +935,7 @@ func BenchmarkStringArrayValue(b *testing.B) {
 func TestGenericArrayScanUnsupported(t *testing.T) {
 	var s string
 	var ss []string
+	var nsa [1]sql.NullString
 
 	for _, tt := range []struct {
 		src, dest interface{}
@@ -820,6 +945,7 @@ func TestGenericArrayScanUnsupported(t *testing.T) {
 		{nil, true, "destination bool is not a pointer to array or slice"},
 		{nil, &s, "destination *string is not a pointer to array or slice"},
 		{nil, ss, "destination []string is not a pointer to array or slice"},
+		{nil, &nsa, "<nil> to [1]sql.NullString"},
 		{true, &ss, "bool to []string"},
 		{`{{x}}`, &ss, "multidimensional ARRAY[1][1] is not implemented"},
 		{`{{x},{x}}`, &ss, "multidimensional ARRAY[2][1] is not implemented"},
@@ -862,6 +988,28 @@ func TestGenericArrayScanScannerArrayString(t *testing.T) {
 	}
 }
 
+func TestGenericArrayScanScannerSliceEmpty(t *testing.T) {
+	var nss []sql.NullString
+
+	if err := (GenericArray{&nss}).Scan(`{}`); err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if nss == nil || len(nss) != 0 {
+		t.Errorf("Expected empty, got %#v", nss)
+	}
+}
+
+func TestGenericArrayScanScannerSliceNil(t *testing.T) {
+	nss := []sql.NullString{{String: ``, Valid: true}, {}}
+
+	if err := (GenericArray{&nss}).Scan(nil); err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if nss != nil {
+		t.Errorf("Expected nil, got %+v", nss)
+	}
+}
+
 func TestGenericArrayScanScannerSliceBytes(t *testing.T) {
 	src, expected, nss := []byte(`{NULL,abc,"\""}`),
 		[]sql.NullString{{}, {String: `abc`, Valid: true}, {String: `"`, Valid: true}},
@@ -977,6 +1125,22 @@ func TestGenericArrayValue(t *testing.T) {
 		t.Errorf("Expected nil, got %q", result)
 	}
 
+	for _, tt := range []interface{}{
+		[]bool(nil),
+		[][]int(nil),
+		[]*int(nil),
+		[]sql.NullString(nil),
+	} {
+		result, err := GenericArray{tt}.Value()
+
+		if err != nil {
+			t.Fatalf("Expected no error for %#v, got %v", tt, err)
+		}
+		if result != nil {
+			t.Errorf("Expected nil for %#v, got %q", tt, result)
+		}
+	}
+
 	Tilde := func(v driver.Value) FuncArrayValuer {
 		return FuncArrayValuer{
 			func() string { return "~" },

vendor/github.com/lib/pq/conn.go

@@ -3,15 +3,12 @@ package pq
 import (
 	"bufio"
 	"crypto/md5"
-	"crypto/tls"
-	"crypto/x509"
 	"database/sql"
 	"database/sql/driver"
 	"encoding/binary"
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"os"
 	"os/user"
@@ -101,6 +98,15 @@ type conn struct {
 	namei     int
 	scratch   [512]byte
 	txnStatus transactionStatus
+	txnClosed chan<- struct{}
+
+	// Save connection arguments to use during CancelRequest.
+	dialer Dialer
+	opts   values
+
+	// Cancellation key data for use with CancelRequest messages.
+	processID int
+	secretKey int
 
 	parameterStatus parameterStatus
 
@@ -310,7 +316,10 @@ func DialOpen(d Dialer, name string) (_ driver.Conn, err error) {
 		}
 	}
 
-	cn := &conn{}
+	cn := &conn{
+		opts:   o,
+		dialer: d,
+	}
 	err = cn.handleDriverSettings(o)
 	if err != nil {
 		return nil, err
@@ -532,7 +541,15 @@ func (cn *conn) Begin() (_ driver.Tx, err error) {
 	return cn, nil
 }
 
+func (cn *conn) closeTxn() {
+	if cn.txnClosed != nil {
+		close(cn.txnClosed)
+		cn.txnClosed = nil
+	}
+}
+
 func (cn *conn) Commit() (err error) {
+	defer cn.closeTxn()
 	if cn.bad {
 		return driver.ErrBadConn
 	}
@@ -568,6 +585,7 @@ func (cn *conn) Commit() (err error) {
 }
 
 func (cn *conn) Rollback() (err error) {
+	defer cn.closeTxn()
 	if cn.bad {
 		return driver.ErrBadConn
 	}
@@ -718,6 +736,8 @@ func decideColumnFormats(colTyps []oid.Oid, forceText bool) (colFmts []format, c
 		case oid.T_int4:
 			fallthrough
 		case oid.T_int2:
+			fallthrough
+		case oid.T_uuid:
 			colFmts[i] = formatBinary
 			allText = false
 
@@ -797,7 +817,11 @@ func (cn *conn) Close() (err error) {
 }
 
 // Implement the "Queryer" interface
-func (cn *conn) Query(query string, args []driver.Value) (_ driver.Rows, err error) {
+func (cn *conn) Query(query string, args []driver.Value) (driver.Rows, error) {
+	return cn.query(query, args)
+}
+
+func (cn *conn) query(query string, args []driver.Value) (_ *rows, err error) {
 	if cn.bad {
 		return nil, driver.ErrBadConn
 	}
@@ -1000,42 +1024,12 @@ func (cn *conn) recv1() (t byte, r *readBuf) {
 }
 
 func (cn *conn) ssl(o values) {
-	verifyCaOnly := false
-	tlsConf := tls.Config{}
-	switch mode := o.Get("sslmode"); mode {
-	// "require" is the default.
-	case "", "require":
-		// We must skip TLS's own verification since it requires full
-		// verification since Go 1.3.
-		tlsConf.InsecureSkipVerify = true
-
-		// From http://www.postgresql.org/docs/current/static/libpq-ssl.html:
-		// Note: For backwards compatibility with earlier versions of PostgreSQL, if a
-		// root CA file exists, the behavior of sslmode=require will be the same as
-		// that of verify-ca, meaning the server certificate is validated against the
-		// CA. Relying on this behavior is discouraged, and applications that need
-		// certificate validation should always use verify-ca or verify-full.
-		if _, err := os.Stat(o.Get("sslrootcert")); err == nil {
-			verifyCaOnly = true
-		} else {
-			o.Set("sslrootcert", "")
-		}
-	case "verify-ca":
-		// We must skip TLS's own verification since it requires full
-		// verification since Go 1.3.
-		tlsConf.InsecureSkipVerify = true
-		verifyCaOnly = true
-	case "verify-full":
-		tlsConf.ServerName = o.Get("host")
-	case "disable":
+	upgrade := ssl(o)
+	if upgrade == nil {
+		// Nothing to do
 		return
-	default:
-		errorf(`unsupported sslmode %q; only "require" (default), "verify-full", "verify-ca", and "disable" supported`, mode)
 	}
 
-	cn.setupSSLClientCertificates(&tlsConf, o)
-	cn.setupSSLCA(&tlsConf, o)
-
 	w := cn.writeBuf(0)
 	w.int32(80877103)
 	cn.sendStartupPacket(w)
@@ -1050,114 +1044,7 @@ func (cn *conn) ssl(o values) {
 		panic(ErrSSLNotSupported)
 	}
 
-	client := tls.Client(cn.c, &tlsConf)
-	if verifyCaOnly {
-		cn.verifyCA(client, &tlsConf)
-	}
-	cn.c = client
-}
-
-// verifyCA carries out a TLS handshake to the server and verifies the
-// presented certificate against the effective CA, i.e. the one specified in
-// sslrootcert or the system CA if sslrootcert was not specified.
-func (cn *conn) verifyCA(client *tls.Conn, tlsConf *tls.Config) {
-	err := client.Handshake()
-	if err != nil {
-		panic(err)
-	}
-	certs := client.ConnectionState().PeerCertificates
-	opts := x509.VerifyOptions{
-		DNSName:       client.ConnectionState().ServerName,
-		Intermediates: x509.NewCertPool(),
-		Roots:         tlsConf.RootCAs,
-	}
-	for i, cert := range certs {
-		if i == 0 {
-			continue
-		}
-		opts.Intermediates.AddCert(cert)
-	}
-	_, err = certs[0].Verify(opts)
-	if err != nil {
-		panic(err)
-	}
-}
-
-// This function sets up SSL client certificates based on either the "sslkey"
-// and "sslcert" settings (possibly set via the environment variables PGSSLKEY
-// and PGSSLCERT, respectively), or if they aren't set, from the .postgresql
-// directory in the user's home directory.  If the file paths are set
-// explicitly, the files must exist.  The key file must also not be
-// world-readable, or this function will panic with
-// ErrSSLKeyHasWorldPermissions.
-func (cn *conn) setupSSLClientCertificates(tlsConf *tls.Config, o values) {
-	var missingOk bool
-
-	sslkey := o.Get("sslkey")
-	sslcert := o.Get("sslcert")
-	if sslkey != "" && sslcert != "" {
-		// If the user has set an sslkey and sslcert, they *must* exist.
-		missingOk = false
-	} else {
-		// Automatically load certificates from ~/.postgresql.
-		user, err := user.Current()
-		if err != nil {
-			// user.Current() might fail when cross-compiling.  We have to
-			// ignore the error and continue without client certificates, since
-			// we wouldn't know where to load them from.
-			return
-		}
-
-		sslkey = filepath.Join(user.HomeDir, ".postgresql", "postgresql.key")
-		sslcert = filepath.Join(user.HomeDir, ".postgresql", "postgresql.crt")
-		missingOk = true
-	}
-
-	// Check that both files exist, and report the error or stop, depending on
-	// which behaviour we want.  Note that we don't do any more extensive
-	// checks than this (such as checking that the paths aren't directories);
-	// LoadX509KeyPair() will take care of the rest.
-	keyfinfo, err := os.Stat(sslkey)
-	if err != nil && missingOk {
-		return
-	} else if err != nil {
-		panic(err)
-	}
-	_, err = os.Stat(sslcert)
-	if err != nil && missingOk {
-		return
-	} else if err != nil {
-		panic(err)
-	}
-
-	// If we got this far, the key file must also have the correct permissions
-	kmode := keyfinfo.Mode()
-	if kmode != kmode&0600 {
-		panic(ErrSSLKeyHasWorldPermissions)
-	}
-
-	cert, err := tls.LoadX509KeyPair(sslcert, sslkey)
-	if err != nil {
-		panic(err)
-	}
-	tlsConf.Certificates = []tls.Certificate{cert}
-}
-
-// Sets up RootCAs in the TLS configuration if sslrootcert is set.
-func (cn *conn) setupSSLCA(tlsConf *tls.Config, o values) {
-	if sslrootcert := o.Get("sslrootcert"); sslrootcert != "" {
-		tlsConf.RootCAs = x509.NewCertPool()
-
-		cert, err := ioutil.ReadFile(sslrootcert)
-		if err != nil {
-			panic(err)
-		}
-
-		ok := tlsConf.RootCAs.AppendCertsFromPEM(cert)
-		if !ok {
-			errorf("couldn't parse pem in sslrootcert")
-		}
-	}
+	cn.c = upgrade(cn.c)
 }
 
 // isDriverSetting returns true iff a setting is purely for configuring the
@@ -1212,6 +1099,7 @@ func (cn *conn) startup(o values) {
 		t, r := cn.recv()
 		switch t {
 		case 'K':
+			cn.processBackendKeyData(r)
 		case 'S':
 			cn.processParameterStatus(r)
 		case 'R':
@@ -1439,6 +1327,7 @@ func (cn *conn) parseComplete(commandTag string) (driver.Result, string) {
 
 type rows struct {
 	cn       *conn
+	closed   chan<- struct{}
 	colNames []string
 	colTyps  []oid.Oid
 	colFmts  []format
@@ -1447,6 +1336,9 @@ type rows struct {
 }
 
 func (rs *rows) Close() error {
+	if rs.closed != nil {
+		defer close(rs.closed)
+	}
 	// no need to look at cn.bad as Next() will
 	for {
 		err := rs.Next(nil)
@@ -1651,6 +1543,11 @@ func (cn *conn) readReadyForQuery() {
 	}
 }
 
+func (c *conn) processBackendKeyData(r *readBuf) {
+	c.processID = r.int32()
+	c.secretKey = r.int32()
+}
+
 func (cn *conn) readParseResponse() {
 	t, r := cn.recv1()
 	switch t {

vendor/github.com/lib/pq/conn_go18.go

@@ -0,0 +1,92 @@
+// +build go1.8
+
+package pq
+
+import (
+	"context"
+	"database/sql/driver"
+	"errors"
+)
+
+// Implement the "QueryerContext" interface
+func (cn *conn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
+	list := make([]driver.Value, len(args))
+	for i, nv := range args {
+		list[i] = nv.Value
+	}
+	var closed chan<- struct{}
+	if ctx.Done() != nil {
+		closed = watchCancel(ctx, cn.cancel)
+	}
+	r, err := cn.query(query, list)
+	if err != nil {
+		return nil, err
+	}
+	r.closed = closed
+	return r, nil
+}
+
+// Implement the "ExecerContext" interface
+func (cn *conn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
+	list := make([]driver.Value, len(args))
+	for i, nv := range args {
+		list[i] = nv.Value
+	}
+
+	if ctx.Done() != nil {
+		closed := watchCancel(ctx, cn.cancel)
+		defer close(closed)
+	}
+
+	return cn.Exec(query, list)
+}
+
+// Implement the "ConnBeginTx" interface
+func (cn *conn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
+	if opts.Isolation != 0 {
+		return nil, errors.New("isolation levels not supported")
+	}
+	if opts.ReadOnly {
+		return nil, errors.New("read-only transactions not supported")
+	}
+	tx, err := cn.Begin()
+	if err != nil {
+		return nil, err
+	}
+	if ctx.Done() != nil {
+		cn.txnClosed = watchCancel(ctx, cn.cancel)
+	}
+	return tx, nil
+}
+
+func watchCancel(ctx context.Context, cancel func()) chan<- struct{} {
+	closed := make(chan struct{})
+	go func() {
+		select {
+		case <-ctx.Done():
+			cancel()
+		case <-closed:
+		}
+	}()
+	return closed
+}
+
+func (cn *conn) cancel() {
+	var err error
+	can := &conn{}
+	can.c, err = dial(cn.dialer, cn.opts)
+	if err != nil {
+		return
+	}
+	can.ssl(cn.opts)
+
+	defer can.errRecover(&err)
+
+	w := can.writeBuf(0)
+	w.int32(80877102) // cancel request code
+	w.int32(cn.processID)
+	w.int32(cn.secretKey)
+
+	can.sendStartupPacket(w)
+	_ = can.c.Close()
+}

vendor/github.com/lib/pq/copy.go

@@ -97,13 +97,13 @@ awaitCopyInResponse:
 			err = parseError(r)
 		case 'Z':
 			if err == nil {
-				cn.bad = true
+				ci.setBad()
 				errorf("unexpected ReadyForQuery in response to COPY")
 			}
 			cn.processReadyForQuery(r)
 			return nil, err
 		default:
-			cn.bad = true
+			ci.setBad()
 			errorf("unknown response for copy query: %q", t)
 		}
 	}
@@ -122,7 +122,7 @@ awaitCopyInResponse:
 			cn.processReadyForQuery(r)
 			return nil, err
 		default:
-			cn.bad = true
+			ci.setBad()
 			errorf("unknown response for CopyFail: %q", t)
 		}
 	}
@@ -143,7 +143,7 @@ func (ci *copyin) resploop() {
 		var r readBuf
 		t, err := ci.cn.recvMessage(&r)
 		if err != nil {
-			ci.cn.bad = true
+			ci.setBad()
 			ci.setError(err)
 			ci.done <- true
 			return
@@ -161,7 +161,7 @@ func (ci *copyin) resploop() {
 			err := parseError(&r)
 			ci.setError(err)
 		default:
-			ci.cn.bad = true
+			ci.setBad()
 			ci.setError(fmt.Errorf("unknown response during CopyIn: %q", t))
 			ci.done <- true
 			return
@@ -169,6 +169,19 @@ func (ci *copyin) resploop() {
 	}
 }
 
+func (ci *copyin) setBad() {
+	ci.Lock()
+	ci.cn.bad = true
+	ci.Unlock()
+}
+
+func (ci *copyin) isBad() bool {
+	ci.Lock()
+	b := ci.cn.bad
+	ci.Unlock()
+	return b
+}
+
 func (ci *copyin) isErrorSet() bool {
 	ci.Lock()
 	isSet := (ci.err != nil)
@@ -206,7 +219,7 @@ func (ci *copyin) Exec(v []driver.Value) (r driver.Result, err error) {
 		return nil, errCopyInClosed
 	}
 
-	if ci.cn.bad {
+	if ci.isBad() {
 		return nil, driver.ErrBadConn
 	}
 	defer ci.cn.errRecover(&err)
@@ -244,7 +257,7 @@ func (ci *copyin) Close() (err error) {
 	}
 	ci.closed = true
 
-	if ci.cn.bad {
+	if ci.isBad() {
 		return driver.ErrBadConn
 	}
 	defer ci.cn.errRecover(&err)

vendor/github.com/lib/pq/encode.go

@@ -76,6 +76,12 @@ func binaryDecode(parameterStatus *parameterStatus, s []byte, typ oid.Oid) inter
 		return int64(int32(binary.BigEndian.Uint32(s)))
 	case oid.T_int2:
 		return int64(int16(binary.BigEndian.Uint16(s)))
+	case oid.T_uuid:
+		b, err := decodeUUIDBinary(s)
+		if err != nil {
+			panic(err)
+		}
+		return b
 
 	default:
 		errorf("don't know how to decode binary parameter of type %d", uint32(typ))
@@ -471,7 +477,7 @@ func FormatTimestamp(t time.Time) []byte {
 		t = t.AddDate((-t.Year())*2+1, 0, 0)
 		bc = true
 	}
-	b := []byte(t.Format(time.RFC3339Nano))
+	b := []byte(t.Format("2006-01-02 15:04:05.999999999Z07:00"))
 
 	_, offset := t.Zone()
 	offset = offset % 60

vendor/github.com/lib/pq/encode_test.go

@@ -141,22 +141,22 @@ var formatTimeTests = []struct {
 	time     time.Time
 	expected string
 }{
-	{time.Time{}, "0001-01-01T00:00:00Z"},
-	{time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "2001-02-03T04:05:06.123456789Z"},
-	{time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "2001-02-03T04:05:06.123456789+02:00"},
-	{time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "2001-02-03T04:05:06.123456789-06:00"},
-	{time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "2001-02-03T04:05:06-07:30:09"},
+	{time.Time{}, "0001-01-01 00:00:00Z"},
+	{time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "2001-02-03 04:05:06.123456789Z"},
+	{time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "2001-02-03 04:05:06.123456789+02:00"},
+	{time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "2001-02-03 04:05:06.123456789-06:00"},
+	{time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "2001-02-03 04:05:06-07:30:09"},
 
-	{time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "0001-02-03T04:05:06.123456789Z"},
-	{time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "0001-02-03T04:05:06.123456789+02:00"},
-	{time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "0001-02-03T04:05:06.123456789-06:00"},
+	{time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "0001-02-03 04:05:06.123456789Z"},
+	{time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "0001-02-03 04:05:06.123456789+02:00"},
+	{time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "0001-02-03 04:05:06.123456789-06:00"},
 
-	{time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "0001-02-03T04:05:06.123456789Z BC"},
-	{time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "0001-02-03T04:05:06.123456789+02:00 BC"},
-	{time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "0001-02-03T04:05:06.123456789-06:00 BC"},
+	{time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "0001-02-03 04:05:06.123456789Z BC"},
+	{time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "0001-02-03 04:05:06.123456789+02:00 BC"},
+	{time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "0001-02-03 04:05:06.123456789-06:00 BC"},
 
-	{time.Date(1, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "0001-02-03T04:05:06-07:30:09"},
-	{time.Date(0, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "0001-02-03T04:05:06-07:30:09 BC"},
+	{time.Date(1, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "0001-02-03 04:05:06-07:30:09"},
+	{time.Date(0, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "0001-02-03 04:05:06-07:30:09 BC"},
 }
 
 func TestFormatTs(t *testing.T) {
@@ -168,6 +168,26 @@ func TestFormatTs(t *testing.T) {
 	}
 }
 
+func TestFormatTsBackend(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	var str string
+	err := db.QueryRow("SELECT '2001-02-03T04:05:06.007-08:09:10'::time::text").Scan(&str)
+	if err == nil {
+		t.Fatalf("PostgreSQL is accepting an ISO timestamp input for time")
+	}
+
+	for i, tt := range formatTimeTests {
+		for _, typ := range []string{"date", "time", "timetz", "timestamp", "timestamptz"} {
+			err = db.QueryRow("SELECT $1::"+typ+"::text", tt.time).Scan(&str)
+			if err != nil {
+				t.Errorf("%d: incorrect time format for %v on the backend: %v", i, typ, err)
+			}
+		}
+	}
+}
+
 func TestTimestampWithTimeZone(t *testing.T) {
 	db := openTestConn(t)
 	defer db.Close()

vendor/github.com/lib/pq/go18_test.go

@@ -2,7 +2,12 @@
 
 package pq
 
-import "testing"
+import (
+	"context"
+	"database/sql"
+	"testing"
+	"time"
+)
 
 func TestMultipleSimpleQuery(t *testing.T) {
 	db := openTestConn(t)
@@ -66,3 +71,95 @@ func TestMultipleSimpleQuery(t *testing.T) {
 		t.Fatal("unexpected result set")
 	}
 }
+
+func TestContextCancelExec(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	// Delay execution for just a bit until db.ExecContext has begun.
+	go func() {
+		time.Sleep(time.Millisecond * 10)
+		cancel()
+	}()
+
+	// Not canceled until after the exec has started.
+	if _, err := db.ExecContext(ctx, "select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "pq: canceling statement due to user request" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	// Context is already canceled, so error should come before execution.
+	if _, err := db.ExecContext(ctx, "select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "context canceled" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+}
+
+func TestContextCancelQuery(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	// Delay execution for just a bit until db.QueryContext has begun.
+	go func() {
+		time.Sleep(time.Millisecond * 10)
+		cancel()
+	}()
+
+	// Not canceled until after the exec has started.
+	if _, err := db.QueryContext(ctx, "select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "pq: canceling statement due to user request" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	// Context is already canceled, so error should come before execution.
+	if _, err := db.QueryContext(ctx, "select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "context canceled" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+}
+
+func TestContextCancelBegin(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	ctx, cancel := context.WithCancel(context.Background())
+	tx, err := db.BeginTx(ctx, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Delay execution for just a bit until tx.Exec has begun.
+	go func() {
+		time.Sleep(time.Millisecond * 10)
+		cancel()
+	}()
+
+	// Not canceled until after the exec has started.
+	if _, err := tx.Exec("select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "pq: canceling statement due to user request" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	// Transaction is canceled, so expect an error.
+	if _, err := tx.Query("select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err != sql.ErrTxDone {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	// Context is canceled, so cannot begin a transaction.
+	if _, err := db.BeginTx(ctx, nil); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "context canceled" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+}

vendor/github.com/lib/pq/ssl.go

@@ -0,0 +1,175 @@
+package pq
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"io/ioutil"
+	"net"
+	"os"
+	"os/user"
+	"path/filepath"
+)
+
+// ssl generates a function to upgrade a net.Conn based on the "sslmode" and
+// related settings. The function is nil when no upgrade should take place.
+func ssl(o values) func(net.Conn) net.Conn {
+	verifyCaOnly := false
+	tlsConf := tls.Config{}
+	switch mode := o.Get("sslmode"); mode {
+	// "require" is the default.
+	case "", "require":
+		// We must skip TLS's own verification since it requires full
+		// verification since Go 1.3.
+		tlsConf.InsecureSkipVerify = true
+
+		// From http://www.postgresql.org/docs/current/static/libpq-ssl.html:
+		// Note: For backwards compatibility with earlier versions of PostgreSQL, if a
+		// root CA file exists, the behavior of sslmode=require will be the same as
+		// that of verify-ca, meaning the server certificate is validated against the
+		// CA. Relying on this behavior is discouraged, and applications that need
+		// certificate validation should always use verify-ca or verify-full.
+		if _, err := os.Stat(o.Get("sslrootcert")); err == nil {
+			verifyCaOnly = true
+		} else {
+			o.Set("sslrootcert", "")
+		}
+	case "verify-ca":
+		// We must skip TLS's own verification since it requires full
+		// verification since Go 1.3.
+		tlsConf.InsecureSkipVerify = true
+		verifyCaOnly = true
+	case "verify-full":
+		tlsConf.ServerName = o.Get("host")
+	case "disable":
+		return nil
+	default:
+		errorf(`unsupported sslmode %q; only "require" (default), "verify-full", "verify-ca", and "disable" supported`, mode)
+	}
+
+	sslClientCertificates(&tlsConf, o)
+	sslCertificateAuthority(&tlsConf, o)
+	sslRenegotiation(&tlsConf)
+
+	return func(conn net.Conn) net.Conn {
+		client := tls.Client(conn, &tlsConf)
+		if verifyCaOnly {
+			sslVerifyCertificateAuthority(client, &tlsConf)
+		}
+		return client
+	}
+}
+
+// sslClientCertificates adds the certificate specified in the "sslcert" and
+// "sslkey" settings, or if they aren't set, from the .postgresql directory
+// in the user's home directory. The configured files must exist and have
+// the correct permissions.
+func sslClientCertificates(tlsConf *tls.Config, o values) {
+	sslkey := o.Get("sslkey")
+	sslcert := o.Get("sslcert")
+
+	var cinfo, kinfo os.FileInfo
+	var err error
+
+	if sslcert != "" && sslkey != "" {
+		// Check that both files exist. Note that we don't do any more extensive
+		// checks than this (such as checking that the paths aren't directories);
+		// LoadX509KeyPair() will take care of the rest.
+		cinfo, err = os.Stat(sslcert)
+		if err != nil {
+			panic(err)
+		}
+
+		kinfo, err = os.Stat(sslkey)
+		if err != nil {
+			panic(err)
+		}
+	} else {
+		// Automatically find certificates from ~/.postgresql
+		sslcert, sslkey, cinfo, kinfo = sslHomeCertificates()
+
+		if cinfo == nil || kinfo == nil {
+			// No certificates to load
+			return
+		}
+	}
+
+	// The files must also have the correct permissions
+	sslCertificatePermissions(cinfo, kinfo)
+
+	cert, err := tls.LoadX509KeyPair(sslcert, sslkey)
+	if err != nil {
+		panic(err)
+	}
+	tlsConf.Certificates = []tls.Certificate{cert}
+}
+
+// sslCertificateAuthority adds the RootCA specified in the "sslrootcert" setting.
+func sslCertificateAuthority(tlsConf *tls.Config, o values) {
+	if sslrootcert := o.Get("sslrootcert"); sslrootcert != "" {
+		tlsConf.RootCAs = x509.NewCertPool()
+
+		cert, err := ioutil.ReadFile(sslrootcert)
+		if err != nil {
+			panic(err)
+		}
+
+		ok := tlsConf.RootCAs.AppendCertsFromPEM(cert)
+		if !ok {
+			errorf("couldn't parse pem in sslrootcert")
+		}
+	}
+}
+
+// sslHomeCertificates returns the path and stats of certificates in the current
+// user's home directory.
+func sslHomeCertificates() (cert, key string, cinfo, kinfo os.FileInfo) {
+	user, err := user.Current()
+
+	if err != nil {
+		// user.Current() might fail when cross-compiling. We have to ignore the
+		// error and continue without client certificates, since we wouldn't know
+		// from where to load them.
+		return
+	}
+
+	cert = filepath.Join(user.HomeDir, ".postgresql", "postgresql.crt")
+	key = filepath.Join(user.HomeDir, ".postgresql", "postgresql.key")
+
+	cinfo, err = os.Stat(cert)
+	if err != nil {
+		cinfo = nil
+	}
+
+	kinfo, err = os.Stat(key)
+	if err != nil {
+		kinfo = nil
+	}
+
+	return
+}
+
+// sslVerifyCertificateAuthority carries out a TLS handshake to the server and
+// verifies the presented certificate against the CA, i.e. the one specified in
+// sslrootcert or the system CA if sslrootcert was not specified.
+func sslVerifyCertificateAuthority(client *tls.Conn, tlsConf *tls.Config) {
+	err := client.Handshake()
+	if err != nil {
+		panic(err)
+	}
+	certs := client.ConnectionState().PeerCertificates
+	opts := x509.VerifyOptions{
+		DNSName:       client.ConnectionState().ServerName,
+		Intermediates: x509.NewCertPool(),
+		Roots:         tlsConf.RootCAs,
+	}
+	for i, cert := range certs {
+		if i == 0 {
+			continue
+		}
+		opts.Intermediates.AddCert(cert)
+	}
+	_, err = certs[0].Verify(opts)
+	if err != nil {
+		panic(err)
+	}
+}

vendor/github.com/lib/pq/ssl_go1.7.go

@@ -0,0 +1,14 @@
+// +build go1.7
+
+package pq
+
+import "crypto/tls"
+
+// Accept renegotiation requests initiated by the backend.
+//
+// Renegotiation was deprecated then removed from PostgreSQL 9.5, but
+// the default configuration of older versions has it enabled. Redshift
+// also initiates renegotiations and cannot be reconfigured.
+func sslRenegotiation(conf *tls.Config) {
+	conf.Renegotiation = tls.RenegotiateFreelyAsClient
+}

vendor/github.com/lib/pq/ssl_permissions.go

@@ -0,0 +1,16 @@
+// +build !windows
+
+package pq
+
+import "os"
+
+// sslCertificatePermissions checks the permissions on user-supplied certificate
+// files. The key file should have very little access.
+//
+// libpq does not check key file permissions on Windows.
+func sslCertificatePermissions(cert, key os.FileInfo) {
+	kmode := key.Mode()
+	if kmode != kmode&0600 {
+		panic(ErrSSLKeyHasWorldPermissions)
+	}
+}

vendor/github.com/lib/pq/ssl_renegotiation.go

@@ -0,0 +1,8 @@
+// +build !go1.7
+
+package pq
+
+import "crypto/tls"
+
+// Renegotiation is not supported by crypto/tls until Go 1.7.
+func sslRenegotiation(*tls.Config) {}

vendor/github.com/lib/pq/ssl_windows.go

@@ -0,0 +1,9 @@
+// +build windows
+
+package pq
+
+import "os"
+
+// sslCertificatePermissions checks the permissions on user-supplied certificate
+// files. In libpq, this is a no-op on Windows.
+func sslCertificatePermissions(cert, key os.FileInfo) {}

vendor/github.com/lib/pq/uuid.go

@@ -0,0 +1,23 @@
+package pq
+
+import (
+	"encoding/hex"
+	"fmt"
+)
+
+// decodeUUIDBinary interprets the binary format of a uuid, returning it in text format.
+func decodeUUIDBinary(src []byte) ([]byte, error) {
+	if len(src) != 16 {
+		return nil, fmt.Errorf("pq: unable to decode uuid; bad length: %d", len(src))
+	}
+
+	dst := make([]byte, 36)
+	dst[8], dst[13], dst[18], dst[23] = '-', '-', '-', '-'
+	hex.Encode(dst[0:], src[0:4])
+	hex.Encode(dst[9:], src[4:6])
+	hex.Encode(dst[14:], src[6:8])
+	hex.Encode(dst[19:], src[8:10])
+	hex.Encode(dst[24:], src[10:16])
+
+	return dst, nil
+}

vendor/github.com/lib/pq/uuid_test.go

@@ -0,0 +1,46 @@
+package pq
+
+import (
+	"reflect"
+	"strings"
+	"testing"
+)
+
+func TestDecodeUUIDBinaryError(t *testing.T) {
+	t.Parallel()
+	_, err := decodeUUIDBinary([]byte{0x12, 0x34})
+
+	if err == nil {
+		t.Fatal("Expected error, got none")
+	}
+	if !strings.HasPrefix(err.Error(), "pq:") {
+		t.Errorf("Expected error to start with %q, got %q", "pq:", err.Error())
+	}
+	if !strings.Contains(err.Error(), "bad length: 2") {
+		t.Errorf("Expected error to contain length, got %q", err.Error())
+	}
+}
+
+func BenchmarkDecodeUUIDBinary(b *testing.B) {
+	x := []byte{0x03, 0xa3, 0x52, 0x2f, 0x89, 0x28, 0x49, 0x87, 0x84, 0xd6, 0x93, 0x7b, 0x36, 0xec, 0x27, 0x6f}
+
+	for i := 0; i < b.N; i++ {
+		decodeUUIDBinary(x)
+	}
+}
+
+func TestDecodeUUIDBackend(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	var s string = "a0ecc91d-a13f-4fe4-9fce-7e09777cc70a"
+	var scanned interface{}
+
+	err := db.QueryRow(`SELECT $1::uuid`, s).Scan(&scanned)
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if !reflect.DeepEqual(scanned, []byte(s)) {
+		t.Errorf("Expected []byte(%q), got %T(%q)", s, scanned, scanned)
+	}
+}